Comparison of Macroscopic and Microscopic Simulation Models in Modern Roundabout Analysis

Modern roundabouts are more and more widely used at both urban and rural intersections in North America. The results of traffic operations analysis at roundabouts often depend on the software used and parameters adopted. For an evaluation of types of traffic analysis tools on roundabout operations, a macroscopic traffic analysis software (SIDRA) and a microscopic simulation package (VISSIM) were used to analyze a two-lane roundabout at the intersection of two rural arterial highways in Alberta, Canada. A full range of traffic flow rates and left-turn proportions was loaded to the roundabout to compare the two traffic analysis tools and to evaluate the effects of different factors on the roundabout performance. Average control delay and 95% queue length were used as measures of effectiveness. Factors such as total traffic flow rate and left-turn vehicle proportion in each approach were analyzed to evaluate the sensitivity of the roundabout performance at different factor levels. The results showed that there was no significant difference for the delays predicted by VISSIM simulation and SIDRA at medium-to-high traffic flow rates and at all left-turn proportion levels. The 95% queue length predicted by VISSIM was longer than those predicted by SIDRA. Good correlation existed between predicted delays and 95% queue length from the two types of software. Both types of software needed parameter calibration for local traffic conditions. Roundabout capacity could also be estimated from a delay curve obtained from the method presented in this study.

• Record URL:
  https://doi.org/10.3141/2265-27
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=Comparison+of+Macroscopic+and+Microscopic+Simulation+Models+in+Modern+Roundabout+Analysis&author=D.+Yin&author=T.+Qiu&publication_year=2011
• Availability:
  • Find a library where document is available. Order URL: http://www.trb.org/Main/Blurbs/166819.aspx
• Authors:
  • Yin, Derek
  • Qiu, Tony Z
• Publication Date: 2011

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 244-252
• Monograph Title: Highway and Traffic Safety: Vehicles, Behavior, and Roundabouts
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Issue Number: 2265
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Highway capacity; Highway operations; Left turns; Roundabouts; Rural areas; Traffic delays; Traffic flow; Traffic flow rate; Traffic queuing; Traffic simulation
• Identifier Terms: SIDRA (Computer program); VISSIM (Computer model)
• Geographic Terms: Alberta
• Subject Areas: Highways; Operations and Traffic Management; I73: Traffic Control;

Filing Info

• Accession Number: 01334292
• Record Type: Publication
• ISBN: 9780309223027
• Report/Paper Numbers: 11-2062
• Files: TRIS, TRB
• Created Date: Mar 28 2011 8:38AM